var md5 = {};
md5.ByteMD5 = function (arr, Type) {
  return binl2hex(coreMD5(arr2binl(arr)))

  function safe_add(x, y) {
    var lsw = (x & 0xFFFF) + (y & 0xFFFF)
    var msw = (x >> 16) + (y >> 16) + (lsw >> 16)
    return (msw << 16) | (lsw & 0xFFFF)
  }

  function rol(num, cnt) {
    return (num << cnt) | (num >>> (32 - cnt))
  }

  function cmn(q, a, b, x, s, t) {
    return safe_add(rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b)
  }

  function ff(a, b, c, d, x, s, t) {
    return cmn((b & c) | ((~b) & d), a, b, x, s, t)
  }

  function gg(a, b, c, d, x, s, t) {
    return cmn((b & d) | (c & (~d)), a, b, x, s, t)
  }

  function hh(a, b, c, d, x, s, t) {
    return cmn(b ^ c ^ d, a, b, x, s, t)
  }

  function ii(a, b, c, d, x, s, t) {
    return cmn(c ^ (b | (~d)), a, b, x, s, t)
  }

  function coreMD5(x) {
    var a = 1732584193
    var b = -271733879
    var c = -1732584194
    var d = 271733878
    for (var i = 0; i < x.length; i += 16) {
      var olda = a
      var oldb = b
      var oldc = c
      var oldd = d
      a = ff(a, b, c, d, x[i + 0], 7, -680876936)
      d = ff(d, a, b, c, x[i + 1], 12, -389564586)
      c = ff(c, d, a, b, x[i + 2], 17, 606105819)
      b = ff(b, c, d, a, x[i + 3], 22, -1044525330)
      a = ff(a, b, c, d, x[i + 4], 7, -176418897)
      d = ff(d, a, b, c, x[i + 5], 12, 1200080426)
      c = ff(c, d, a, b, x[i + 6], 17, -1473231341)
      b = ff(b, c, d, a, x[i + 7], 22, -45705983)
      a = ff(a, b, c, d, x[i + 8], 7, 1770035416)
      d = ff(d, a, b, c, x[i + 9], 12, -1958414417)
      c = ff(c, d, a, b, x[i + 10], 17, -42063)
      b = ff(b, c, d, a, x[i + 11], 22, -1990404162)
      a = ff(a, b, c, d, x[i + 12], 7, 1804603682)
      d = ff(d, a, b, c, x[i + 13], 12, -40341101)
      c = ff(c, d, a, b, x[i + 14], 17, -1502002290)
      b = ff(b, c, d, a, x[i + 15], 22, 1236535329)
      a = gg(a, b, c, d, x[i + 1], 5, -165796510)
      d = gg(d, a, b, c, x[i + 6], 9, -1069501632)
      c = gg(c, d, a, b, x[i + 11], 14, 643717713)
      b = gg(b, c, d, a, x[i + 0], 20, -373897302)
      a = gg(a, b, c, d, x[i + 5], 5, -701558691)
      d = gg(d, a, b, c, x[i + 10], 9, 38016083)
      c = gg(c, d, a, b, x[i + 15], 14, -660478335)
      b = gg(b, c, d, a, x[i + 4], 20, -405537848)
      a = gg(a, b, c, d, x[i + 9], 5, 568446438)
      d = gg(d, a, b, c, x[i + 14], 9, -1019803690)
      c = gg(c, d, a, b, x[i + 3], 14, -187363961)
      b = gg(b, c, d, a, x[i + 8], 20, 1163531501)
      a = gg(a, b, c, d, x[i + 13], 5, -1444681467)
      d = gg(d, a, b, c, x[i + 2], 9, -51403784)
      c = gg(c, d, a, b, x[i + 7], 14, 1735328473)
      b = gg(b, c, d, a, x[i + 12], 20, -1926607734)
      a = hh(a, b, c, d, x[i + 5], 4, -378558)
      d = hh(d, a, b, c, x[i + 8], 11, -2022574463)
      c = hh(c, d, a, b, x[i + 11], 16, 1839030562)
      b = hh(b, c, d, a, x[i + 14], 23, -35309556)
      a = hh(a, b, c, d, x[i + 1], 4, -1530992060)
      d = hh(d, a, b, c, x[i + 4], 11, 1272893353)
      c = hh(c, d, a, b, x[i + 7], 16, -155497632)
      b = hh(b, c, d, a, x[i + 10], 23, -1094730640)
      a = hh(a, b, c, d, x[i + 13], 4, 681279174)
      d = hh(d, a, b, c, x[i + 0], 11, -358537222)
      c = hh(c, d, a, b, x[i + 3], 16, -722521979)
      b = hh(b, c, d, a, x[i + 6], 23, 76029189)
      a = hh(a, b, c, d, x[i + 9], 4, -640364487)
      d = hh(d, a, b, c, x[i + 12], 11, -421815835)
      c = hh(c, d, a, b, x[i + 15], 16, 530742520)
      b = hh(b, c, d, a, x[i + 2], 23, -995338651)
      a = ii(a, b, c, d, x[i + 0], 6, -198630844)
      d = ii(d, a, b, c, x[i + 7], 10, 1126891415)
      c = ii(c, d, a, b, x[i + 14], 15, -1416354905)
      b = ii(b, c, d, a, x[i + 5], 21, -57434055)
      a = ii(a, b, c, d, x[i + 12], 6, 1700485571)
      d = ii(d, a, b, c, x[i + 3], 10, -1894986606)
      c = ii(c, d, a, b, x[i + 10], 15, -1051523)
      b = ii(b, c, d, a, x[i + 1], 21, -2054922799)
      a = ii(a, b, c, d, x[i + 8], 6, 1873313359)
      d = ii(d, a, b, c, x[i + 15], 10, -30611744)
      c = ii(c, d, a, b, x[i + 6], 15, -1560198380)
      b = ii(b, c, d, a, x[i + 13], 21, 1309151649)
      a = ii(a, b, c, d, x[i + 4], 6, -145523070)
      d = ii(d, a, b, c, x[i + 11], 10, -1120210379)
      c = ii(c, d, a, b, x[i + 2], 15, 718787259)
      b = ii(b, c, d, a, x[i + 9], 21, -343485551)
      a = safe_add(a, olda)
      b = safe_add(b, oldb)
      c = safe_add(c, oldc)
      d = safe_add(d, oldd)
    }
    if (Type == 32) {
      return [a, b, c, d];
    }
    else {
      return [b, c];
    }
  }

  function binl2hex(binarray) {
    var hex_tab = "0123456789abcdef"
    var str = ""
    for (var i = 0; i < binarray.length * 4; i++) {
      str += hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8 + 4)) & 0xF) +
        hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8)) & 0xF)
    }
    return str
  }

  function arr2binl(arr) {
    var nblk = ((arr.length + 8) >> 6) + 1
    var blks = new Array(nblk * 16)
    for (var i = 0; i < nblk * 16; i++) blks[i] = 0
    for (var i = 0; i < arr.length; i++)
      blks[i >> 2] |= (arr[i] & 0xFF) << ((i % 4) * 8)
    blks[i >> 2] |= 0x80 << ((i % 4) * 8)
    blks[nblk * 16 - 2] = arr.length * 8
    return blks
  }
}

md5.MD5 = function (s) {
  var len = s.length;
  var arr = new Array(len);
  for (var i = 0; i < len; i++) {
    var cc = s.charCodeAt(i);
    arr[i] = cc & 0xFF;
  }
  return md5.ByteMD5(arr, 32);
}
export default md5;
